Journal of the American Chemical Society p. 5291 - 5295 (1984)
Update date:2022-08-25
Topics:
Hrovat, David A.
Liu, Jerry H.
Turro, Nicholas J.
Weiss, Richard G.
Photolyses of 1-(4-methylphenyl)-3-phenylpropan-2-one (1a) and 1,3-diphenylpropan-2-one (1b) have been conducted in solid, liquid-crystalline, and isotropic phases of a 35/65 (w/w) mixture of cholesteryl chloride/cholesteryl nonanoate (CCl/CN), trans,trans-4'-n-butylbicyclohexane-4-carbonitrile (BCCN), or n-butyl stearate (BS).The fraction of in-cage recombination of benzyl radicals (Fc) produced upon decarbonylation of 1a depends strongly upon solvent phase.The effects of magnetic field upon Fc for 1a and the degree of isotopic enrichment of photolyzed 1b in mesophases are described.The results in BS, especially, indicate that solvent-containment barriers, whose origin does not lie in phase discontinuities or large polarity differences, can influence strongly Fc.
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